Overview
The 9907-963 speed protection module from Woodward’s EasyGen® 3200 family is designed to continuously monitor rotational speed in engines and turbine-driven systems. Using signals from a magnetic pickup or proximity sensor, the module evaluates real-time speed data and activates protective relay outputs when defined overspeed or underspeed thresholds are exceeded.
The 9907-963 module is engineered for generator sets, marine propulsion systems, and industrial prime movers where precise and dependable speed protection is required. Its digital processing ensures stable measurement accuracy and rapid response to abnormal conditions, helping prevent mechanical damage and system instability.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 9907-963 |
| Product Series | EasyGen® 3200 |
| Manufacturer | Woodward |
| Device Type | Speed Monitoring & Protection Module |
| Speed Signal Inputs | Magnetic Pickup (MPU) or Proximity Sensor |
| Input Frequency Range | 5 Hz – 12 kHz |
| Configurable Speed Range | 50 – 9,999 RPM |
| Speed Resolution | ±1 RPM |
| Response Delay Setting | 0.1 – 25.5 seconds adjustable |
| Protective Outputs | Two independent SPDT relays |
| Relay Function | Overspeed shutdown and underspeed alarm |
| Relay Contact Rating | 5 A at 30 VDC / 250 VAC (resistive load) |
| Supply Voltage | 11 – 35 VDC |
| Power Consumption | Typically < 5 W |
| Operating Temperature | –40°C to +85°C |
| Storage Temperature | –40°C to +105°C |
| Environmental Protection | 5–95% RH non-condensing |
| Vibration / Shock | IEC 60068 industrial standard compliance |
| Safety Standards | IEC 61508 functional safety compatible |
| Dimensions | 150 × 90 × 35 mm |
| Weight | 2.20 lb |
Functional Characteristics
• Dual relay protection allowing independent overspeed and underspeed trip outputs • High-resolution digital RPM measurement with stable signal processing • Configurable delay timers to avoid nuisance shutdowns during transient events • Compatible with common industrial speed sensors including MPU and proximity probes • Wide DC supply range suitable for generator control cabinets and marine installations • Rugged design for extreme temperature and vibration environments
Application Scenarios
The 9907-963 protection module is typically integrated into control panels and protection systems that require reliable speed monitoring of rotating equipment.
Typical applications include:
• Diesel and gas generator sets • Steam or gas turbine auxiliary control systems • Marine propulsion engines • Industrial compressors and pump drives • Backup and emergency power generation units
Installation and Operational Notes
Correct configuration of overspeed and underspeed setpoints is critical for reliable protection performance. Improper settings may cause unnecessary shutdowns or insufficient protection during abnormal operating conditions.
Routine inspection of speed sensors and wiring is recommended to maintain measurement accuracy and ensure dependable system operation.
FAQ
What type of sensors can be connected to the 9907-963 module? The module supports magnetic pickup (MPU) sensors and proximity-based speed sensors commonly used in engine and turbine speed detection.
Can the overspeed and underspeed limits be adjusted? Yes. Both protection thresholds and delay timers can be configured to match the operational requirements of the monitored equipment.
Is the module suitable for generator protection systems? Yes. The device is widely used in generator control panels to provide independent speed protection during startup, synchronization, and load transitions.
